He started off his career by cleaning studio floors and training for 4 years at YG Entertainment. He debuted in 2003 in S. Korea with his title song, "Come Back to Me" and later expanded through different parts of Asia. Then, Se7en debuted in Japan in 2005 with the title song called, "Light." Currently, he is working with American producers to release music in U.S.

Se7en believes it is his obligation to always sing live. He is very dedicated to fans and passionate about music.